Miter-box.



v PATENTED JAN. 28, 1908.

J. KNUDSON.

2 SHEETS-SHEET 1.

PATENTED JAN. 28, 1908.

J. KNUDSON.

MITER BOX.

APPLICATION FILED MAY 13. 1907.

2 SHEETSSHEET 2.

STAT

PATENT Q F Q-Ea;

JENS KNUDSON, OF nEs MQINES, Iowa.

man-Box.

To all whom it may concern: I fi Be it'known that-I, JENs KNUDSON, ac1t1- zen of the United States of America, and resident of Des Moines,Polk county, Iowa, have invented a new and useful Miter-Box, of whichthe following is'a specification.

The object of this invention is to provide im roved construction formiter boxes.

further object of this invention is to provide means for constructing amiter box 0 en at the front for the placing and. remova of 'materialbeneath the saw.

My invention consists 1n the construction, arrangement and combinationofelements hereinafter set forth, pointed out in my claims andillustrated by the accompanying drawin ,in which Tigure 1 is a plan ofthe com lete miter box in position for making a beve cut. Fig. 2 is anend elevation of the miter box in os1- tion to make a square cut. Fig. 3is a ont elevation of the same, the saw removed, the

v dotted lines indicating posltions assumed by base fixed to and carriedby legs 11, 12.

arts 'in makin under-cuts and miter-cuts. ig. 4 is a detai section onthe indicated line 44 of Fig. 3. Fig. 5 is a detail section illustratingcertain structural elements. Flg. 6 is a detail section on the indicatedline 6-6 of Fig. 1. Fig. 7 is a detail section on the indicated line 7-7of Fig. 1.

In the construction of the miter box as shown, the numeral 10 designatesa bedmor e legs 11, 12 are arched intermediate of their ends and areadapted to rest upon or be fixed to a suitable support (not shown) suchas a work bench. A semicircular plate 13 is fixed to the lower face ofthe bed or base 10 intermediate of the legs and the plane diametricalmargin of said plate is flush with the rear margin of the base while theconvex margin of the plate projects forward from the front mar in of thebase. An ear 14 projects rearwardly from the center of the rear marginof the plate 13 and a lever 15 is fulcrumed on said ear by a bolt 16.The lever 15 extends across the plate 13 and projects at each endtherefrom. A ca screw 17 is seated in the forward portion of the lever15 and the head thereofoverlaps the curved forward margin of the plate13 and is adapted to slide thereon. An ad usting screw 18 is seated inthe lever 15 beneath and adapted for contact by the head of the capscrew 17, and said adjusting screw determines the degree of seating ofthe v Specification of Letters Patent; Application filed m 13.1907.Serial 1%. 378.320

Patented Jan. 28, 1993.

- the lever is held to the plate 13-. A latch 19 is fulcrumed atits'rear end on the lever 15 and extends forwardly beneath and nearly tothe front end of said lever. Screws or posts 20, 21 are seated in thelever 15 and extend downward on opposite sidesof the latch 19. A barwasher 22 is mounted loosely on the screws 20, 21 and crosses beneaththe latch 19. Expansive coil springs 23', 24 are mounted on the screws20, 21 between and impinging the heads of the screws and the bar washer22. It is the function of the springs 23, 24 to hold the latch 19yieldingly against the bottom of the lever 15. A in 25 is mountedpivotall in the latch 19 and extends vertically throug an aperture inthe lever 15 and through one or another of holes 26 in the plate 13. Itis the function of the in 25 to lock the lever in any desired anglerelative to the plate 13. A headed pin 27 is fixed in the outer endortion of the latch 19 and extends loosely t on h an aperture in theouter end portion oft e lever 15. It is the function of the headed pin27 to receive thumb pressure of the operator and depress the latch 19sufficiently to withdraw the pin 25 from engagement with the plate 13and permit an angular adjustment of the lever 15 relative to said plate.That portion of the lever 15 at the rear of the bolt '16 is formed as ajournal and a sleeve 28 is mounted loosely thereon. Holes 29 are formedin the sleeve 28 and its journal (Fi 2 and 6) and a key 30 is mountedremovab y, replaceabl and interchangeably in said holes to determinecircumferential adjustment of the sleeve on the journal. Guides 31, 32,

ends to and rise from the ends of the sleeve 28. The guides 31, 32 arespaced'apart in the pairs and are connected rigidly by a crossbar 33 attheir upper ends.

A saw-carrier is mounted slidingly in the guides 31', 32 and a saw 43may be mounted slidingly in the carrier. The saw-carrier is constructedas follows: Plates 34, 35 are arranged parallel with each other betweenand in contact with the inner faces of the guides '31, 32, andareconnected at their upper and lowerends by cleats 36, 37. Lugs 38 arefixed to the outer faces of the plates 34, 35 and slidingly engage theadjacent margins of the guides 31, 32 and steady the carrier in 'verticamovement in the guides. Sawguides 39, 46 are mounted horizontallyarranged in pairs, are fixed at 'their lower transversely of the innerfaces of the plates 34, 35 and the end portions of said guides projectfrom the front and rear margins of the plates and are slightly closertogether than the centers thereof. The saw-guides 39, are arranged inpairs and the pair 40 may be adjusted to greater altitude by removingthescrews 41 from the holes. in which they are shown in the plates 34,35 (Fig. 2) and raising the guides and replacing the screws in the holes42 in said plates. is provision made for raising the guides tocompensate for wear of the saw 43. The guides 39 S11 port and receivesliding engagement of t 1e back 44 of the saw and prevent downwardmovement of the saw independent of the carrier. The guides 39, 40 onopposite sides of the saw maintain the blade parallel with theplates 34,35 of the carrier. A stop 45 is mounted adjustably on one of the guides31 and is adapted to be engaged by and limit downward movement of thesaw-carrier. A detent 46 is ivoted on the cross-bar 33 and isheld'yieldlngly in one direction by a spring 47. A stud 48 on the cleat36 is adapted to be engaged by the detent 46 to hold the carrier and sawin the uppermost limit of movement thereof,when the saw is not in use.The detent may be moved manually to release the stud 48 and permit thecarrier and saw to descend for the use of the saw as shown in Fig.2. Thesleeve 28 is further connected to its journal by a cap screw 49 seatedin the rear end of said journal. Back-plates 50, 51 are provided, oflike construction, each late having one straight end and one beve end.The straight ends of the plates 50, 51 are beveled back as shown inFig. 1. The back plates 50, 51 are secured to the base or bed 10 by capscrews 52 mounted through notches in the lower margins of the lates' andseated in the base. In the use 0' the miter box in cutting at right oracute angles with the saw and its carrier and guides u right, the backplates 50, 51 are positione as shown with their straight edges near eachother and spaced apart for the passage of the saw between them. Whenmiter or under-cuts are to be made, the screws 52 are loosened and oneor the other or both of the back plates are removed and interchanged orreversed and replaced and tightened by the screws 52 .with theinclined'ends of the plate or lates toward the center, as shown bydotted lines in Fig. 'Then the saw, carrier, and guides may be tilted ineither direction to an angle of 45, by first removing the key .30 fromthe sleeve 28 and its journal and re lacing said key in the new thejournal.

Work-holders are provided and are constructed as follows: A tubularscrew 53 (Fig. 5) is seated in a hole in the base 10 adjacent the innerend of either of the back plates 50, 51 and a pointed pin 54 is screwedthrough said tubular screw. The pin 54' is work on said base Thus 10(Fig.7).

position to hold t e sleeve to that the Ipoint of the pin extends abovethe.

face of t e base and can engage a piece of and prevent slipping thereof.7

Work-clamps are provided and are con-. structed as follows: A tubularcylindrical block 55 is formed with a notch adapted to receive the uppermargin of one of the back- -plates 50, 51 and a set screw 56 is screwedinto the bore of said block from the rear and portion of the block 55.and is threadedthereto. The clam-p screw 57 may be turned manually andthe lower end of saidscrew is provided with a loose bushing 58 adaptedto engage and hold a piece of work 59 to-the base 10. A groove 60 isformed in and Iongitudinally o the lower face of the base 10 adjacentthe back-plates 50, 51 and a rod 61 may be mounted in said groove bylongitudinal movement from either end and be locked therein byengagement of a set screw 62 in either of the legs 11, 12.. A head 63 ismounted removably and replaceably on the outer end of the rod 61 and isadapted to be engaged by and sto the outer end of the piece of work 59..his head is em loyed only when the work extends beyond the end of thebase 10. When short pieces of work are being cut from a stick, the head63 is removed from the rod and a return-arm 64 is attached to the outerend of the red by an elbow 64 and returns over the table or base A head65 is mounted or formed on the inner end of the return-arm and engagesthe end of the stick from which short pieces are being cut. Throughlongitudinal adjustment of the rod 61- any desired length of materialmay be gauged relative to the plane of cutting by the saw 43'.

Other work holders may be'provided as follows: Transverse dovetailgrooves 66, 67 may be formed in the base 10 and open to the top thereof.Blocks 68 are fitted to and arranged to slide in the grooves '66, 67 andscrews 69 and threaded in and extend through said blocks. The screws andblocks are adjusted so that the-forward margin of the work is engaged bythe screws, and then the screws are advanced slightly and enga e thebottoms ofthe grooves 66, 67 and lit the blocks into rigid engagementwith the inclined upper walls of the grooves. I claim as my invention 1.A miter box, comprising a base, a lever relative to said 2. A miter box,comprising a base, a lever fulcrumed for oscillation on said base, meansfor latching said lever to said base, a guide frame mounted for rotaryadjustment on said lever and located wholly at the rear of said base, asaw-carrier slidingly mounted on'said guide frame, means for lockingsaid saw-carrier in said. guide frame, and horizontal saw-guides in saidsaw-carrier.

3. A miter box, comprising a base,

cillation on said base, a semicircular plate projecting forward fromsaid base, a latch connecting said lever and plate, a sleeve mounted orrotary adjustment on the rear end of said lever, yokes fixed to andrisin from said sleeve, plates mounted for vertica adjustment in saidyokes and located wholly at the rear of said base, means for lockingsaid plates in said yokes, and saw-guides be- 4. A miter box, comprisinga base, legs carrying said base, screws seated in and projectingrearward fromsaid base, back plates formed with mar inal notchesembracin said screws, said ack plates each formed with a square end anda beveled end adapted tobe removed and reversed and replaced screws, alever fulcrumed for oscillation on said base, a guide frame mounted forrotary adjustment on the rear end of said plates.

screws, a block formed with a transverse said lever and wholly at therear of said base, a saw-carrier slidingl mounted on'said guide ing saidsaw-carrier in said guide frame, and horizontal saw. guides in saidsaw-carrier.

5. A miter box, comprising a base, legs supporting the base, asemi-circular plate mounted beneath. said base and apertured in itsforward curved margin, a lever fulcrumed on'said plate, a latch on saidlever, a pin on said latch engaging in one or another of the aperturesin said plate, said latch springheld in one direction and adapted formanual 'actuation in the opposite direction, a'sleeve mounted for rotaryadjustment on the rear 'end of said lever, yokes fixed to and risingfrom said sleeve, plates mounted slidingly between said yokes, means forlatching said plates in their uppermost position, and horizontal sawguides-between and .carried by 6., In a miter box, a base, screwsmounted in and projecting rearward from said base, back platesformed'with notches in their lower margins embracin said screws, each ofsaid back plates forme with a square end and a beveled end-and adaptedto be re-- moved, reversed and replaced relative to said legs carryingsaid base, a lever fulcrumed for os,-

groove in its lower face adapted to removably embrace and engage eithermargin of either back plate, a set screw mounted lon itudinally of saidblock and intersecting tie groove therein and adapted toengage the ackplate, and a clamp-screw extending throu h said block in front ofandparallel with t e back plate.

7. In a miter box, a base, screws seated in said base, and back platesformed with marinal notches embracing said screws, said ack plates eachformed with a square end and a beveled end and adapted to be removed andreplaced and reversed relative to said screws.

8. In. a miter box, a base screws seated in and projecting horizontallyfrom said base and back plates formed with marginal notches removablyand replaceably mounted on said screws, said back plates each formedwith one straight end and one inclined end, thus adapting said platesfor adjustment in reversed positions relative to the screws.

9. In a miter box, a lever mounted for oscillation, a guide framemounted for rotary adjustment on saidlever, a saw-carrier slidinglymounted in said guide frame, a detent on said frame and a stud on saidcarrier adapted to be enga ed by said detent- 10. In a miter I 0x, aournal, a sleeve loosely mounted thereon, saidsleev e and journal formedwith registering apertures, a

key in said apertures, a guide frame fixed to said sleeve, a saw-carrierslidingly mounted in said frame, and means for latching said carrier tosaid frame.

1 1. In a miter box, a lever, a sleeve mounted for rotary adjustment onsaid-lever, yokes embracin and fixed to' said sleeve, plates mountedetween the arms of said yokes and means for adjusting said platesvertically in said yokes.

1 2. In a miter box, a lever, a sleeve mo unted for rotary adjustment onsaid lever, yokes embracing and fixed to said sleeve, plates slidinglymounted betweenthe arms of said yokes, guides mounted transversely ofandbetween said plates, andmeans for limiting vertical movement of saidplates and guides.

13. In a miter 'box a base, tubular screws mounted in said base, andpointed pins.

screwed through the bores of said tubular I screws.

Signed by me at Des Momes, Iowa, this

